owltech
Version:
This a backend for OwlTech Company
131 lines • 5.6 kB
JavaScript
;
// Copyright 2018, Google, LLC.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
function getRetryConfig(err) {
return __awaiter(this, void 0, void 0, function* () {
let config = getConfig(err);
if ((!err || !err.config) || (!config && !err.config.retry)) {
return { shouldRetry: false };
}
config = config || {};
config.currentRetryAttempt = config.currentRetryAttempt || 0;
config.retry =
(config.retry === undefined || config.retry === null) ? 3 : config.retry;
config.retryDelay = config.retryDelay || 100;
config.httpMethodsToRetry =
config.httpMethodsToRetry || ['GET', 'HEAD', 'PUT', 'OPTIONS', 'DELETE'];
config.noResponseRetries = (config.noResponseRetries === undefined ||
config.noResponseRetries === null) ?
2 :
config.noResponseRetries;
// If this wasn't in the list of status codes where we want
// to automatically retry, return.
const retryRanges = [
// https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
// 1xx - Retry (Informational, request still processing)
// 2xx - Do not retry (Success)
// 3xx - Do not retry (Redirect)
// 4xx - Do not retry (Client errors)
// 429 - Retry ("Too Many Requests")
// 5xx - Retry (Server errors)
[100, 199], [429, 429], [500, 599]
];
config.statusCodesToRetry = config.statusCodesToRetry || retryRanges;
// Put the config back into the err
err.config.retryConfig = config;
// Determine if we should retry the request
const shouldRetryFn = config.shouldRetry || shouldRetryRequest;
if (!shouldRetryFn(err)) {
return { shouldRetry: false, config: err.config };
}
// Calculate time to wait with exponential backoff.
// Formula: (2^c - 1 / 2) * 1000
const delay = (Math.pow(2, config.currentRetryAttempt) - 1) / 2 * 1000;
// We're going to retry! Incremenent the counter.
err.config.retryConfig.currentRetryAttempt += 1;
// Create a promise that invokes the retry after the backOffDelay
const backoff = new Promise(resolve => {
setTimeout(resolve, delay);
});
// Notify the user if they added an `onRetryAttempt` handler
if (config.onRetryAttempt) {
config.onRetryAttempt(err);
}
// Return the promise in which recalls Gaxios to retry the request
yield backoff;
return { shouldRetry: true, config: err.config };
});
}
exports.getRetryConfig = getRetryConfig;
/**
* Determine based on config if we should retry the request.
* @param err The GaxiosError passed to the interceptor.
*/
function shouldRetryRequest(err) {
const config = getConfig(err);
// If there's no config, or retries are disabled, return.
if (!config || config.retry === 0) {
return false;
}
// Check if this error has no response (ETIMEDOUT, ENOTFOUND, etc)
if (!err.response &&
((config.currentRetryAttempt || 0) >= config.noResponseRetries)) {
return false;
}
// Only retry with configured HttpMethods.
if (!err.config.method ||
config.httpMethodsToRetry.indexOf(err.config.method.toUpperCase()) < 0) {
return false;
}
// If this wasn't in the list of status codes where we want
// to automatically retry, return.
if (err.response && err.response.status) {
let isInRange = false;
for (const [min, max] of config.statusCodesToRetry) {
const status = err.response.status;
if (status >= min && status <= max) {
isInRange = true;
break;
}
}
if (!isInRange) {
return false;
}
}
// If we are out of retry attempts, return
config.currentRetryAttempt = config.currentRetryAttempt || 0;
if (config.currentRetryAttempt >= config.retry) {
return false;
}
return true;
}
/**
* Acquire the raxConfig object from an GaxiosError if available.
* @param err The Gaxios error with a config object.
*/
function getConfig(err) {
if (err && err.config && err.config.retryConfig) {
return err.config.retryConfig;
}
return;
}
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